Wri
CRITIQUE & EXPLAIN
William solved an equation for x and wrote justifications for each step of his
solutions.
Prc
6(14 + x)= 108
84 + 6x = 108
6x = 108 - 84
6x = 24
x= 4
Given
Distributive Property
Subtraction Property of Equality
Simplify
Multiplication Property of Equality
A. Make Sense and Persevere Are William's justifications valid at each step?
If not, what might you change? Explain.

answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

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